class GeocoderController < ApplicationController
+ require "cgi"
+ require "uri"
+ require "rexml/document"
- require 'net/http'
- require 'rexml/document'
+ before_action :authorize_web
+ before_action :set_locale
+ before_action :require_oauth, :only => [:search]
def search
- @res_hash = {}
- @postcode_arr = []
-
-
- if params[:query][:place_name] != nil or ""
- place_name = params[:query][:place_name]
- Net::HTTP.start('ws.geonames.org') do |http|
- res = http.get("/search?q=#{place_name}&maxRows=10")
- xml = REXML::Document.new(res.body)
- xml.elements.each("/geonames/geoname") do |ele|
- ele.elements.each("name"){ |n| @res_hash['name'] = n.text }
- ele.elements.each("countryCode"){ |n| @res_hash['country'] = n.text }
- ele.elements.each("lat"){ |n| @res_hash['lat'] = n.text }
- ele.elements.each("lng"){ |n| @res_hash['lon']= n.text }
+ @params = normalize_params
+ @sources = []
+
+ if @params[:lat] && @params[:lon]
+ @sources.push "latlon"
+ @sources.push "osm_nominatim_reverse"
+ @sources.push "geonames_reverse" if defined?(GEONAMES_USERNAME)
+ elsif @params[:query]
+ if @params[:query] =~ /^\d{5}(-\d{4})?$/
+ @sources.push "osm_nominatim"
+ elsif @params[:query] =~ /^(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])\s*[0-9][ABD-HJLNP-UW-Z]{2})$/i
+ @sources.push "uk_postcode"
+ @sources.push "osm_nominatim"
+ elsif @params[:query] =~ /^[A-Z]\d[A-Z]\s*\d[A-Z]\d$/i
+ @sources.push "ca_postcode"
+ @sources.push "osm_nominatim"
+ else
+ @sources.push "osm_nominatim"
+ @sources.push "geonames" if defined?(GEONAMES_USERNAME)
+ end
+ end
+
+ if @sources.empty?
+ head :bad_request
+ else
+ render :layout => map_layout
+ end
+ end
+
+ def search_latlon
+ lat = params[:lat].to_f
+ lon = params[:lon].to_f
+ if lat < -90 || lat > 90
+ @error = "Latitude #{lat} out of range"
+ render :action => "error"
+ elsif lon < -180 || lon > 180
+ @error = "Longitude #{lon} out of range"
+ render :action => "error"
+ else
+ @results = [{ :lat => lat, :lon => lon,
+ :zoom => params[:zoom],
+ :name => "#{lat}, #{lon}" }]
+
+ render :action => "results"
+ end
+ end
+
+ def search_uk_postcode
+ # get query parameters
+ query = params[:query]
+
+ # create result array
+ @results = []
+
+ # ask npemap.org.uk to do a combined npemap + freethepostcode search
+ response = fetch_text("http://www.npemap.org.uk/cgi/geocoder.fcgi?format=text&postcode=#{escape_query(query)}")
+
+ # parse the response
+ unless response =~ /Error/
+ dataline = response.split(/\n/)[1]
+ data = dataline.split(/,/) # easting,northing,postcode,lat,long
+ postcode = data[2].delete("'")
+ zoom = POSTCODE_ZOOM - postcode.count("#")
+ @results.push(:lat => data[3], :lon => data[4], :zoom => zoom,
+ :name => postcode)
+ end
+
+ render :action => "results"
+ rescue StandardError => ex
+ @error = "Error contacting www.npemap.org.uk: #{ex}"
+ render :action => "error"
+ end
+
+ def search_ca_postcode
+ # get query parameters
+ query = params[:query]
+ @results = []
+
+ # ask geocoder.ca (note - they have a per-day limit)
+ response = fetch_xml("https://geocoder.ca/?geoit=XML&postal=#{escape_query(query)}")
+
+ # parse the response
+ if response.get_elements("geodata/error").empty?
+ @results.push(:lat => response.text("geodata/latt"),
+ :lon => response.text("geodata/longt"),
+ :zoom => POSTCODE_ZOOM,
+ :name => query.upcase)
+ end
+
+ render :action => "results"
+ rescue StandardError => ex
+ @error = "Error contacting geocoder.ca: #{ex}"
+ render :action => "error"
+ end
+
+ def search_osm_nominatim
+ # get query parameters
+ query = params[:query]
+ minlon = params[:minlon]
+ minlat = params[:minlat]
+ maxlon = params[:maxlon]
+ maxlat = params[:maxlat]
+
+ # get view box
+ viewbox = "&viewbox=#{minlon},#{maxlat},#{maxlon},#{minlat}" if minlon && minlat && maxlon && maxlat
+
+ # get objects to excude
+ exclude = "&exclude_place_ids=#{params[:exclude]}" if params[:exclude]
+
+ # ask nominatim
+ response = fetch_xml("#{NOMINATIM_URL}search?format=xml&extratags=1&q=#{escape_query(query)}#{viewbox}#{exclude}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
+
+ # extract the results from the response
+ results = response.elements["searchresults"]
+
+ # extract parameters from more_url
+ more_url_params = CGI.parse(URI.parse(results.attributes["more_url"]).query)
+
+ # create result array
+ @results = []
+
+ # create parameter hash for "more results" link
+ @more_params = params
+ .permit(:query, :minlon, :minlat, :maxlon, :maxlat, :exclude)
+ .merge(:exclude => more_url_params["exclude_place_ids"].first)
+
+ # parse the response
+ results.elements.each("place") do |place|
+ lat = place.attributes["lat"]
+ lon = place.attributes["lon"]
+ klass = place.attributes["class"]
+ type = place.attributes["type"]
+ name = place.attributes["display_name"]
+ min_lat, max_lat, min_lon, max_lon = place.attributes["boundingbox"].split(",")
+ prefix_name = if type.empty?
+ ""
+ else
+ t "geocoder.search_osm_nominatim.prefix.#{klass}.#{type}", :default => type.tr("_", " ").capitalize
+ end
+ if klass == "boundary" && type == "administrative"
+ rank = (place.attributes["place_rank"].to_i + 1) / 2
+ prefix_name = t "geocoder.search_osm_nominatim.admin_levels.level#{rank}", :default => prefix_name
+ place.elements["extratags"].elements.each("tag") do |extratag|
+ prefix_name = t "geocoder.search_osm_nominatim.prefix.place.#{extratag.attributes['value']}", :default => prefix_name if extratag.attributes["key"] == "place"
end
end
+ prefix = t "geocoder.search_osm_nominatim.prefix_format", :name => prefix_name
+ object_type = place.attributes["osm_type"]
+ object_id = place.attributes["osm_id"]
+
+ @results.push(:lat => lat, :lon => lon,
+ :min_lat => min_lat, :max_lat => max_lat,
+ :min_lon => min_lon, :max_lon => max_lon,
+ :prefix => prefix, :name => name,
+ :type => object_type, :id => object_id)
end
-
- if params[:query][:postcode]
- postcode = params[:query][:postcode]
- Net::HTTP.start('www.freethepostcode.org') do |http|
- unless resp.code ~ /^2*/
- resp = http.get("/geocode?postcode=#{postcode}")
- lat = resp.body.scan(/[4-6][0-9]\.?[0-9]+/)
- lon = resp.body.scan(/[-+][0-9]\.?[0-9]+/)
- @postcode_array = [lat, lon]
- else
+
+ render :action => "results"
+ rescue StandardError => ex
+ @error = "Error contacting nominatim.openstreetmap.org: #{ex}"
+ render :action => "error"
+ end
+
+ def search_geonames
+ # get query parameters
+ query = params[:query]
+
+ # get preferred language
+ lang = I18n.locale.to_s.split("-").first
+
+ # create result array
+ @results = []
+
+ # ask geonames.org
+ response = fetch_xml("http://api.geonames.org/search?q=#{escape_query(query)}&lang=#{lang}&maxRows=20&username=#{GEONAMES_USERNAME}")
+
+ # parse the response
+ response.elements.each("geonames/geoname") do |geoname|
+ lat = geoname.text("lat")
+ lon = geoname.text("lng")
+ name = geoname.text("name")
+ country = geoname.text("countryName")
+
+ @results.push(:lat => lat, :lon => lon,
+ :zoom => GEONAMES_ZOOM,
+ :name => name,
+ :suffix => ", #{country}")
+ end
+
+ render :action => "results"
+ rescue StandardError => ex
+ @error = "Error contacting api.geonames.org: #{ex}"
+ render :action => "error"
+ end
+
+ def search_osm_nominatim_reverse
+ # get query parameters
+ lat = params[:lat]
+ lon = params[:lon]
+ zoom = params[:zoom]
+
+ # create result array
+ @results = []
+
+ # ask nominatim
+ response = fetch_xml("#{NOMINATIM_URL}reverse?lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
+
+ # parse the response
+ response.elements.each("reversegeocode/result") do |result|
+ lat = result.attributes["lat"]
+ lon = result.attributes["lon"]
+ object_type = result.attributes["osm_type"]
+ object_id = result.attributes["osm_id"]
+ description = result.text
+
+ @results.push(:lat => lat, :lon => lon,
+ :zoom => zoom,
+ :name => description,
+ :type => object_type, :id => object_id)
+ end
+
+ render :action => "results"
+ rescue StandardError => ex
+ @error = "Error contacting nominatim.openstreetmap.org: #{ex}"
+ render :action => "error"
+ end
+
+ def search_geonames_reverse
+ # get query parameters
+ lat = params[:lat]
+ lon = params[:lon]
+
+ # get preferred language
+ lang = I18n.locale.to_s.split("-").first
+
+ # create result array
+ @results = []
+
+ # ask geonames.org
+ response = fetch_xml("http://api.geonames.org/countrySubdivision?lat=#{lat}&lng=#{lon}&lang=#{lang}&username=#{GEONAMES_USERNAME}")
+
+ # parse the response
+ response.elements.each("geonames/countrySubdivision") do |geoname|
+ name = geoname.text("adminName1")
+ country = geoname.text("countryName")
+
+ @results.push(:lat => lat, :lon => lon,
+ :zoom => GEONAMES_ZOOM,
+ :name => name,
+ :suffix => ", #{country}")
+ end
+
+ render :action => "results"
+ rescue StandardError => ex
+ @error = "Error contacting api.geonames.org: #{ex}"
+ render :action => "error"
+ end
+
+ private
+
+ def fetch_text(url)
+ response = OSM.http_client.get(URI.parse(url))
+
+ if response.success?
+ response.body
+ else
+ raise response.status.to_s
+ end
+ end
+
+ def fetch_xml(url)
+ REXML::Document.new(fetch_text(url))
+ end
+
+ def escape_query(query)
+ CGI.escape(query)
+ end
+
+ def normalize_params
+ if query = params[:query]
+ query.strip!
+
+ if latlon = query.match(/^([NS])\s*(\d{1,3}(\.\d*)?)\W*([EW])\s*(\d{1,3}(\.\d*)?)$/).try(:captures) # [NSEW] decimal degrees
+ params.merge!(nsew_to_decdeg(latlon)).delete(:query)
+ elsif latlon = query.match(/^(\d{1,3}(\.\d*)?)\s*([NS])\W*(\d{1,3}(\.\d*)?)\s*([EW])$/).try(:captures) # decimal degrees [NSEW]
+ params.merge!(nsew_to_decdeg(latlon)).delete(:query)
+
+ elsif latlon = query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?$/).try(:captures) # [NSEW] degrees, decimal minutes
+ params.merge!(ddm_to_decdeg(latlon)).delete(:query)
+ elsif latlon = query.match(/^(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\s*([NS])\W*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\s*([EW])$/).try(:captures) # degrees, decimal minutes [NSEW]
+ params.merge!(ddm_to_decdeg(latlon)).delete(:query)
+
+ elsif latlon = query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?$/).try(:captures) # [NSEW] degrees, minutes, decimal seconds
+ params.merge!(dms_to_decdeg(latlon)).delete(:query)
+ elsif latlon = query.match(/^(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]\s*([NS])\W*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?\s*([EW])$/).try(:captures) # degrees, minutes, decimal seconds [NSEW]
+ params.merge!(dms_to_decdeg(latlon)).delete(:query)
+
+ elsif latlon = query.match(/^\s*([+-]?\d+(\.\d*)?)\s*[\s,]\s*([+-]?\d+(\.\d*)?)\s*$/)
+ params.merge!(:lat => latlon[1].to_f, :lon => latlon[3].to_f).delete(:query)
end
- redirect_to "/index.html?lat=#{@postcode_array[0]}&lon=#{@postcode_array[1]}&zoom=14"
end
+
+ params.permit(:query, :lat, :lon, :zoom, :minlat, :minlon, :maxlat, :maxlon)
+ end
+
+ def nsew_to_decdeg(captures)
+ begin
+ Float(captures[0])
+ lat = !captures[2].casecmp("s").zero? ? captures[0].to_f : -captures[0].to_f
+ lon = !captures[5].casecmp("w").zero? ? captures[3].to_f : -captures[3].to_f
+ rescue StandardError
+ lat = !captures[0].casecmp("s").zero? ? captures[1].to_f : -captures[1].to_f
+ lon = !captures[3].casecmp("w").zero? ? captures[4].to_f : -captures[4].to_f
+ end
+ { :lat => lat, :lon => lon }
+ end
+
+ def ddm_to_decdeg(captures)
+ begin
+ Float(captures[0])
+ lat = !captures[3].casecmp("s").zero? ? captures[0].to_f + captures[1].to_f / 60 : -(captures[0].to_f + captures[1].to_f / 60)
+ lon = !captures[7].casecmp("w").zero? ? captures[4].to_f + captures[5].to_f / 60 : -(captures[4].to_f + captures[5].to_f / 60)
+ rescue StandardError
+ lat = !captures[0].casecmp("s").zero? ? captures[1].to_f + captures[2].to_f / 60 : -(captures[1].to_f + captures[2].to_f / 60)
+ lon = !captures[4].casecmp("w").zero? ? captures[5].to_f + captures[6].to_f / 60 : -(captures[5].to_f + captures[6].to_f / 60)
+ end
+ { :lat => lat, :lon => lon }
+ end
+
+ def dms_to_decdeg(captures)
+ begin
+ Float(captures[0])
+ lat = !captures[4].casecmp("s").zero? ? captures[0].to_f + (captures[1].to_f + captures[2].to_f / 60) / 60 : -(captures[0].to_f + (captures[1].to_f + captures[2].to_f / 60) / 60)
+ lon = !captures[9].casecmp("w").zero? ? captures[5].to_f + (captures[6].to_f + captures[7].to_f / 60) / 60 : -(captures[5].to_f + (captures[6].to_f + captures[7].to_f / 60) / 60)
+ rescue StandardError
+ lat = !captures[0].casecmp("s").zero? ? captures[1].to_f + (captures[2].to_f + captures[3].to_f / 60) / 60 : -(captures[1].to_f + (captures[2].to_f + captures[3].to_f / 60) / 60)
+ lon = !captures[5].casecmp("w").zero? ? captures[6].to_f + (captures[7].to_f + captures[8].to_f / 60) / 60 : -(captures[6].to_f + (captures[7].to_f + captures[8].to_f / 60) / 60)
+ end
+ { :lat => lat, :lon => lon }
end
end
projects / rails.git / blobdiff